visual impairment

NOUN
17 LETTERS · STARTS WITH V

visual impairment is a valid 17-letter word worth 25 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
V4I1S1U1A1L1I1M3P3A1I1R1M3E1N1T1
4 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 3 + 3 + 1 + 1 + 1 + 3 + 1 + 1 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does visual impairment mean?